1. Endometriosis

Endometriosis is a painful condition that causes the lining of the womb to behave abnormally and grow outside the womb

Endometriosis is a chronic condition which occurs when tissue which behaves like the lining of the womb is found outside of the womb - in areas of the body including the ovaries, Fallopian tubes, the abdomen and the bladder.

It can be incredibly painful and cause inflammation in the pelvic area, making sex an uncomfortable experience.

"We often hear about weak pelvic floor muscles and consequent bladder control problems but in the case of painful sex, the pelvic floor muscles become too tight," Heba told Femail.

For women with endometriosis, the constant pain and the presence of endometrial tissue can cause their pelvic muscles to become tense.

Try experimenting with different positions to find which one puts the least pressure on your pelvis.

CLAP TRAP

ALL RISE

WEDDED BLISS

As Ulrika Jonsson admits sexless marriage, here's how to get YOUR spark back

DEAR DEIDRE

Sex with my husband was out of this world — now he only fancies his 50 pigeons

SOME LIKE IT HOT

I've been having sex with my lover for years but I just don't fancy her

FLYING SOLO

Separate-beds experiment led to us having the hottest sex ever — in the kitchen

DEAR DEIDRE

I cheated on my wife with a slim, pretty lady — but I'm worried she's pregnant

SEX APPEAL

I fancy my sexy girlfriend and worry I will lose her if I can't perform in bed

SEX MATCH

Do you have great sexual chemistry with your partner? Take our quiz and find out

INNER TORMENT

Newlywed admits her sex life is non-existent as she’s haunted by abusive past

5. You're just not turned on

If a woman isn't sexually aroused properly, then sex is uncomfortable.

Every woman is different, but for most it takes around 45 minutes to reach peak arousal.

That means the pelvic muscles are relaxed and there is plenty of natural lubrication around the vagina.

Attempting sex after less than 20 minutes of foreplay is a recipe for pain, so make sure you go at a good pace before penetration.

We pay for your stories! Do you have a story for The Sun Online news team? Email us at tips@the-sun.co.uk or call 0207 782 4368. You can WhatsApp us on 07810 791 502. We pay for videos too. Click here to upload yours